Developing new propellants for satellites to replace toxic hydrazine would make launching and handling satellites safer but it also requires disrupting current systems, according to researchers.

The race is on to develop a European reusable rocket that can ensure Europe's autonomous and cost-effective access to space while increasing the sustainability of launches.

If you want to build or fix something in space, you might think you’d need a human to do it. But what if you didn’t? What if robotic spacecraft could be used to refuel satellites in orbit, add new instruments to outdated machinery and even build entire structures while in space?

We need to improve how we keep track of objects in space and predict where they will go in order to avoid collisions in Earth’s increasingly crowded orbit, according to Dimitra Stefoudi, a space law researcher from Leiden University in the Netherlands.